Since Laddie is a little guy, he may need to go more often. My Neechee always needed to go 4 times a day. I also made a big mistake when he was a puppy - he was allowed to go on concrete. BIG MISTAKE. He would always try to "sneak" off and poop in some unauthorized non-grassy area.
Is it just my dogs, or does anyone else have that whole "grass must not touch my belly fur" going on with their Shelties?
My puppy mill rescue, Bela, spent her first five years as a puppy mill mama. She had so little confidence that for the first six months, she didn't bark, whine, or wag her tail. When we got the second dog, she almost immediately fell into the strange routine of being a house dog. Plus, she took up barking as a hobby - but still isn't as barky as my other Sheltie was (he was professional-grade).
She also had a LOT to learn about potty training. Sheltie Rescue had had her in foster care for about six weeks I think, when I got her, and though she was mostly trained, until she got used to us and our daily routine, she had a lot of accidents - like you say, immediately after coming inside, inside her crate, and near the big water dish. I'd love to be able to say I had a sure-fire method for stopping her behavior, but I don't. I just developed a strict routine of taking the girls out every 4-6 hours (matched on my medication schedule). As of today, we have completed our second month of clean floors!